Supported Features
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Dark Interface
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Differentiate Without Colour Alone
JSON Master
Viewer, Editor & Formatter
Free
A fast, native JSON editor for iPhone, iPad and Mac: tree and source in sync, JSONPath queries, JWT decoding, structural compare. In seven languages.
JSON Master is a fast, native JSON editor for iPhone, iPad and Mac, built around what you do with JSON all day: find a value, copy its path, copy a branch, and understand what a field really contains.
The document is shown two ways — as a tree and as highlighted source — and both are the same file. The tree is for reading and restructuring, the source for fixing what does not parse.
FIND YOUR WAY
• Command palette (⌘K): every command by name and a fuzzy jump to any node
• Breadcrumbs, plus back and forward after every jump
• Search over keys and values; matching branches open by themselves
• Full keyboard control on Mac and iPad
READ
• A tree with type badges, item counts, indent guides and previews of collapsed objects
• Highlighted source that keeps working even when the file does not parse
• A broken file explains itself: the exact line and column, one tap away
• One-tap repair for almost-JSON: comments, trailing commas, single quotes
• Large files open in the background without freezing
COPY
• Paths in six notations: dot, JSONPath, brackets, jq, Swift and JSON Pointer
• Values, whole branches (formatted or minified), keys and key-value pairs
UNDERSTAND
The inspector recognises Unix timestamps, JWT tokens, base64, ISO 8601 dates, URLs and integers too large for JavaScript — and shows what they mean.
TOOLS
• Format, minify, sort keys, unwrap JSON embedded in strings
• JSONPath queries with results as you type
• Structural compare: reordered keys and reindentation are not differences
• Generate Swift Codable, TypeScript interfaces or JSON Schema
• A summary that flags duplicate keys, unsafe integers and JSON hidden in strings
• Export as JSON, minified JSON or CSV
EVERYWHERE
• Tree and source side by side on Mac and iPad
• Four themes: Midnight, Graphite, Amber CRT and Daylight
• Seven languages: English, German, French, Ukrainian, Spanish, Japanese and Portuguese. The app follows your system language or the one you choose for it
No account, no ads, no tracking.
Privacy Policy: https://vybgss.github.io/json-master-docs/privacy-policy.html
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
• The interface language is now the same setting as the app's language in system settings. Change it in JSON Master, in iOS Settings or in macOS Language & Region — both stay in sync.
• System menus, dialogs and the document browser now appear in your language too.
• Document type names in Finder are translated.
The developer, Volodymyr Sichka, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Provider
- Volodymyr Sichka
- Size
- 5.1 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 6 more
- English, French, German, Japanese, Portuguese, Spanish, Ukrainian
- Age Rating
4+
- 4+
- Copyright
- © 2026 Volodymyr Sichka